Coaster-brake mechanism



Feb. 17, 1925 C. B. SHWMONS COASTER BRAKE MECHANI SM Filed Deo. 27. 1922Fll n 3 L.. H 40 i E Sheetg sheet E.

Feb, I7. 1925.

C. B. SIMMONS COASTER BRAKE ME CHANI SM Filed Dec. 27, 1922 2Sheets-Sheet 2 A INVENTOR:

Patented Feb. 17, 1925.

UNITED STATES PATENT OFFICE.

CHARLES B. SIMMONS, F BRISTOL, CONNECTICUT, ASSIGNOR T0 THE NEW DEPAR-TUBE MANUFACTURING COMPANY,

0F CONNECTICUT.

OF BRISTOL, CONNECTICUT, .A CORPORATION COASTER-BRAKE MECHANISM.

Application led December 27, 1921. Serial No. 524,883.

To all whom t may concern:

Be it known that I, CHARLES B. SIMMoNs, a citizen of the United States,residing at Bristol, county of Hartford, State of Connecticut, haveinvented a certain new and useful Coaster-Brake Mechanism. of which thefollowing is a full, clear, and exact description. such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, forming part ofthis specication.

My invention relates to coaster brake mechanism, my object being toprovide a structure which can be so associated with the drivingcrank-shaft of a childs velocipede that bv mere instinctive footmovements of the ri er on the ordinary pedals the velocipede can bedriven, can coast, and can be braked. To this end, and also to improvegenerally upon devices of this character, my invention consists in thevarious matters hereinafter described and claimed.

ln the accompanying drawings: Figure 1 is an eleva-tion chiefly insection; Figure 2 is a transverse sectional elevation of the hub shellon about the line 2-2 of Figure 1 looking in the direction of thearrows; Figure 3 is a transverse Sectional elevation on about the line3-3 of Figure 1, looking in the direction of the arrows; Figure 4 is anelevation of the brake anchor when looking at it from its inner end, theaxle or crank-shaft being also indicated in section; Figure 5 is acorresponding view looking at the brake anchor from its outer end, aportion of this brake anchor being shown in Section; Figure 6 is a faceview of the brake arm: Figure 7 is ay top plan view thereof, theassociated frame bar being shown in section; Figure 8 is a detailsectional elevation of the crank-shaft; Figure 9 is a face view of thelocking washer: Figure 10 is a vie\vof the general character of Figure 1but showing a modification; Figure 1l is a perspective of the brakeanchor, shown in Figure 10; Figure 12 is a perspective showing the brakesegments illustrated in Figure 10.

,Referring now more particularly to these drawings, 1 and 2 indicate theusual side bars of the front fork of a velocipede having the axle orcrank-shaft 3 rotatably supported in the lower ends of said bars andordina-ry pedal arms 4 ixedly attached to this crank-shaft. Spaced cones5 and 6, about the crank-shaft, rotatably sup ort the hub 7 of the usualfront, driving, roa wheel, which contacts with the roadway, this hubbeing preferably so supported throu h Series of balls 8 and also beingprovide with the usual openings 9 for the spokes of the wheel.

0n the interior of the hub shell is an annular flange 10 having clutchteeth 11 formed on its inner face, and upon the inner side of thisclutch fiange 10 and within the hub and about the axle is a laterallyshiftable clutch sleeve 12 having clutch teeth 13 and 14 formed in itsrespective ends, this clutch sleeve being also provided in its innercircumference with coarse threads 15 of rather steep pitch which receivethe projecting ends of a driving pin 16 which is driven through theaxle. Brake instrumentalities being provided upon the side of the Sleeve12 opposite to the clutch 10 of the hub shell, it will be ap arent thatu on forward pedalling the cran i-shaft 3 an its driving pin 16 arerotated forwardly and that consequent action of the pin 16 in thethreads 15 serves to shift the connector Sleeve 12 into engagement withthe clutch flange 10 of the hub shell, so that continued forward drivingof the edals in the ordinary Way causes the hub and its attached Wheelto be driven forwardly and propel the veloci` perle; should the ridercease pedalling and hold the pedals stationar the pedal Shaft 3 andits-pin 16 will 'be held stationary while the hub, rotating under themomentum of the velocipede, will continue to move forwardly in thewell-known coasting, the rotating hub shell carrying the connectorsleeve 12 with it at least until the teeth 11 and 13 are disengaged, andthis rotary movement, thus turning the connector 12 with relation to thenow stationary driving pin 16, causes this connector to shift laterallyout of engagement with the hub clutch v10; and a backward rocking of thepedal arms 4 produces a corresponding backward rocking of thecrank-shaft 3 and its pin 16 so that the threaded connection betweenthis pin and the clutch sleeve 12 causes this clutch sleeve to shiftinto connection with the brake instrumentalities and thus permitsbackward pressure upon the pedals to apply the brake.

Considering now these brake instrumentalities, the cone 6 which has thecrankshaft 3 passing through its central aperture is not only providedwith a raceway 17 for the balls 8 but also has an inwardly projectingsleeve 18 of less diameter than the body of the cone so that this conebody presents a shoulder or abutment 19 at that end of the sleeve 18adjacent to such body of the cone, and this cone also, at its outer end,has a reduced, annular, threaded boss 20 Whose interior opening isenlarged, as at 21. for a distance from the outer end of the cone memberso that a shoulder or abutment 22 is produced. This cone 6 anchors thebrake elements, which are here shown as alternating discs 23 and 24 (awell known structure), the dises 23 being of less diameter than is theinterior diameter of the hub and having interior lingers 25 which areslidably received in slots 26 cut diametre cally through the sleeve 18of the brake holder while the discs 24 are apertured and have slightlygreater interior diameter than is the exterior diameter of the sleeve 18and have peripheral fingers 27 which are slidably received inlongitudinal grooves 2S cut in the interior of the hub shell, the disc29 at the end adjacent the connector sleeve 12 being somewhat thickerthan its fellows and having its outer face provided 'with clutch teeth30 which cooperate with the clutch teeth 14 upon the connector 12. Thebrake disc at the end of the series opposita` to what may be termed theactuating dise 29 abuts against the before mentioned shoulder 19. Thus,as these brake discs can move `laterally with respect to each other andto their supporting members but one series of them is, by its fingers25, noni-otatably held upon the sleeve 18 while thc series ofalternating discs, 24, is, by its fingers 27 held against rotation withrespect to the hub shell, it is apparent that when the connector sleeve12 is, as previously explained, forcibly pressed against the disc 29 allof the brake discs are forced against each other and, if the cone 6 beanchored against rotation, the hub will be braked, such braking pressurebeing relie ved as soon as the pedals are again moved forwardly. Byproviding the sleeve 18 andsimply diametrically slotting it as abovedescribed I am able to inexplensively but effectively provide for the hoding connection between the brake discs and the brake-anchoring cone.

To afford abutment against outward movement of this brake anchor 6 I cuta peripheral channel 31 about the crank-shaft- 3 and place substantiallysemi-circular pieces 32 of wire in such channel, the cross section ofthese wire pieces being so great that the wire projects beyond theperiphery of the crank-shaft, and I then slip the brakeanchoring coneover these wire pieces so that the before mentioned shoulder 22 abutsagainst the holding pieces 32 which are themselves held in the channel31 against longitudinal movement and, as these holding pieces arereceived inthe before mentioned aperture 21 of the brake anchor, thesecannot escape from the groove 31, although these holding pieces 32 withthe shaft 3 and the brake anchor 6 can be quickly and easilydisassembled (as well as assembled) by merely sliding the brake anchoralong the crankshaft.

'Io anchor the brake anchor 6 against rotation-about the hub shell Iprovide a brake-arm or anchoring-arm 33 whose enlarged lower portion hasan aperture 34 through which the before mentioned boss 2O passes, thisenlarged lower portion also having projections 35 punched up on itsinner face to enter corresponding recesses 36 formed in the o-uter faceof the body portion of the cone 6, while at the up er end of the arm 33I form a clamp soc et 37 adapted to receive the frame bar 2 of thevelocipede and to have screwed thereto the cooperating clamp piece 38. Anut 39 screwed upon the oss 20 securely holds the anchoring-arm inengagement with the brake anchor 6. The frame bar 2 with its attachedbearing 4() is upon the outer side of the cone 6, while the pedal arm issecurely fastened to the crank-shaft at the outer side of the frame bar2, any desired amount of space between' the pedal arm and the bearing 40being preferably taken up by a washer 41.

The cone 5 is a separate piece threaded onto the axle 3, and Iconveniently provide for the co-operating thread 42 of the axle byupsetting the axle at this portion (as by subjecting the axle to heavyswaging action upon opposite sides) so that at other opposite sides 43of the axle the metal is caused to project beyond the perimeter of thebody of the axle and the threads are cut in, this protruded portion. Thelockwasher 44, placed as usual at the outer side of the cone 5, has acentral aperture 45 whose major portion is curved on about the diameterof the body portion of the axle while smaller portions 46 of thisaperture are curved upon the diameter of the enlarged, threa ed axleortion 42, so that the protruded parts o the axle not only affordmaterial for the thread 42 but also engaging position.

present projections which are engaged by the washer 44 and thus preventthe washer from turning when the lock nut 47 is being screwed into lace.At the outer side of the lock nut 1s the frame bar '1 with itsy bearing(similar to the bearing shown in connection with the frame bar 2) whileoutside of this is the pedal arm fastened to the axle 3 in the usualway, a distancewasher 48 being fitted between the frame bar 1 and thepedalarm. All of the parts are securely held properly assembled and uponthe crank-shaft, and the crank-shaft is securely held in the velocipedeframe, being attachable thereto as a unit-handling structure.

It will be noted that b utilizing a pin 16 (with its ends slabbe olf asat 49 to adapt them to the threads 15), utillzing the abutment pieces 32received in a groove about the axle, and upsettin that portion of theaxle in which the t reads 42 are formed, I am enabled to use for theaxle material of merely the diameter major portion of the axle, thusminimizing the expense for the axle material.

My lag spring 50, whose general function is well understood in this art,consists of a split ring of spring metal received in a groove 51 aroundthe periphery of the connector 12, an outwardl projecting hump 52 beingformed in t e spring at about the point diametrically opposite the spacebetween the spring ends, and the necessary holding of the lagspring isobtained by having this hump Vreceived in one of the before mentionedlongitudinal slots 28 of the hub shell in which the fingers of the brakediscs 24 are also received. This connection of the lag spring to the hubnot only enables this spring to perform all of the usual functions ofsuch an element but also causes the connector, during the coastingaction of the wheel, to shift into engagement with the brake actuator,so that when it is desired to brake, the necessary thrust of theconnector is brought about at once and without the loss of effective.motion heretofore utilized in bringing the connector from a neutralposition into brake- Iu the modification shown in Figures 10, 11, and12, the laterally shiftable connector 120 is tapered upon opposite sidesof its center to produce clutch faces 121 and 122, the former of whichcooperates with a correspondinglyv tapered clutch socket 71 formed inthe interior of the hub shell 70, while upon its side toward the brakethis laterally shiftable connector has a sleeve portion 123 of reduceddiameter extendin from the lower end of the taperedv clutcli portion122. The inwardly projecting sleeve 180 of the brake anchor 60 isthickened at its portion, 181, near the ball raceA of the part, 182, ofthe piece and is tapered, as at 183, inwardly toward the terminal,cylindrical part 184. In the slots 260 of this sleeve 180 are slidablelugs 250 of segmental brake shoes 230 which surround the sleeves 180 and123 and produce a split brake cylinder to cooperate with. the interiorbraking surface 72 of the hub shell, these brake segments being heldtogether by a surrounding split, resilient ring 231. When the laterallyshiftable connector 120 is shifted toward the left (as the parts arehere shown) by the backward rocking of crank-shaft 30 the brake segments230 are forced upon the tapered surfaces 122 and 183 so that as theconnector 120 approaches the brake anchor the segments 23() of the splitbrake cylinder are spread outwardly into braking contact with the hubthe resilient ring 231 serving to retract these brake segments whenbraking pressure is relieved. The pressure of the brake segments uponthe sleeve123 serves the purpose of the lag spring previously described.To facilitate the action of the tapering sur faces 122 and 183 I preferto correspondingly taper the ends of the brake segments as at 232 and233. A split wire ring 61 received in a peripheral groove at the innerend of the sleeve 180 prevents accidental separation of the brakesegments 230 from the brake anchor 60.

Also in this modification I show the brake anchor 60 abutting against asleeve 310 which surrounds the crank-shaft and has at its inner end anannular boss 312. The ball bearings 400, about the crank-shaft andreceived in the frame bars of the velocipede are, respectively, aboutthis sleeve 310 and a corres ondin sleeve 313 near the other end of thecran -shaft The brake arm 330 has its lower portion fitting between thebody portion of the brake anchor 60 and the inner end of the sleeve 310,and a reduced projection 62 of the brake anchor, which is madenoncircular b having straight portions 63 at its sides is is wellunderstood in this art), is received in a corresponding openingr in thelower end of the brake arm. `The brake arm is conveniently secured tothe frame bar 20 by a metal strap 331 which encircles that bar andpasses through an eye formed by a strip 332 punched up from the materialof the arm, and as this eyestrip abuts against the frame bar thenecessitv of bending the arm 330 to bring it against the bar is avoided.

I claim 1. In a velocipede or the like, the combination of a rotatableaxle, a driving road wheel having its hub about said axle and beingrotatable inde endently of the same, means whereby sald hub is drivenwhen said axle is rotated in one direction, but said hub can rotateindependently of said axle,

and means actuated by said axle whereby said hub is braked when saidaxle is moved in the opposite direction.

2. A coaster brake having, in combina* tion, a driven member, arotatable axle within the same, and means whereby upon rotation of saidaxle in one direction said driven member is driven, but said drivenmember can rotate in such driving direction independently of said axle,and upon different movement of said axle said driven member is bral'ed.

3. A coaster brake. having, in combination, a driven member, a rotatableaxle within the driven member, and suitable connections between thedriven member and axle acting to connect the driven member and axle uponrotation of the axle in one d1- rection with relation to the drivenmember, to disconnect the driven member and axle upon stopping therotation of the axle during the continued rotation of the driven member,and to stop the rotation of the driven member u on reversing therotation of the axle wit relation to the driven member.

4. A coaster brake having, in combination, a driven member, a rotatableaxle extending through the driven member with the ends of the axleprojecting beyond the ends of the driven member, suitable connectionsbetween ,the driven member and axle acting to connect the driven memberand axle upon rotation of the axle in one direction with relation to thedriven member, to disconnect the driven member and axle upon stoppingthe rotation of the axle during the continued rotation of the drivenmember, and to stop the rotation of the driven member upon reversing therotation of the axle with relation to the driven member anddrivingdevices connected with both ends of the axle.

5. In a coaster brake in combination, a driven member, a rotatable axle,a shiftable connector, means for driving said connector upon rotation ofsaid axle, and means Whereby upon relative rotation between said axleand said driven member said connector is shifted into and out of drivingrelationship with said driven member, but said driven member can rotateindependently of said axle, and upon movement of said axle, other thanfor driving, said connector serves to brake said driven member.

G, A coaster brake having, in combination, a rotatable axle, a drivingclutch member mounted on the axle and connected to rotate therewith, aco-operatin driven clutch member surrounding sai driving clutch memberand axle, and means acting upon rotation of the axle in one direction toshift the driving clutch member into clutching engagement with thedriven clutch member, acting upon stopping the rotation of the axle withrelation to the driven clutch member to shift the driving clutch memberout of clutching engagement with the driven clutch member, and actingupon reversing the rotation of the axle with relation to the drivenclutch member to further shift the. driving clutch member away from thedriven clutch member, and means acting upon such further shiftingmovement of the driving clutch member to cooperate with the drivingclutch member to stop the rotation of the driven clutch member.

7. A coaster brake having, in combination, a driven member having aclutch face on the interior thereof, an axle extending through thedriven member, a clutch member mounted on the axle and havinff a clutchface adapted to co-operate with tlie clutch face on the driven member toconnect the driven member and axle when these faces are in engagement,threaded operating oonnection between said axle and said clutch member,and means cooperating with. said threaded connection to shift the clutchmember in a direction to engage said clutch faz es upon rotation of theaxle in one direction With relation to the driven member and to shiftthe clutch member in the opposite direction to disengage said clutchfaces upon stopping the rotation of the axle during the continuedrotation of the driven member.

8. A coaster brake having, in combination. a driven member havinga/clutch face on the interior thereof, an axle extending through thedriven member having screw threads thereon, a clutch member mounted onthe axle having screw threads engaging said screw threads on the axleand having a clutch face adapted to co-operate with the clutch face onthe driven member to connect the driven member and axle when these facesare in engagement, and means cooperating with said screw threads of theclutch member and axle to shift the clutch member in a direction toengage said clutch faces upon rotation of the axle in one direction withrelation to thedriven member and to shift the clutch member in theopposite direction to disengage said clutch faces upon stopping therotation of the axle during the continued rotation of the driven member.

9. In aI wheel vehicle, the combination of a driven member haviner ahub, a rotatable axle passing through the hub, means for supporting thehub and axle independently of each other, mechanism connected with theaxle for connectingthe axle with and disconnecting it from the hub, anda brake for the hub actuated by the axle.

10. A coaster brake having, in combination, a hub, a rotatable axlemounted within the hub and havin at least one end extending beyond thehu a bearing surrounding and supporting said axle, driving meansconnected with said end of the axle, and suitable connections betweenthe hub and axle controllable by the axle for connecting anddisconnecting the hub and axle.

11. In a velocipede or the like, the combination with the frame, thedriving road wheel, and the pedals at said driving wheel, of a brake,means for anchoring said brake to Vsaid frame, and means for actuatingsaid brake through the instrumentality of said pedals.

12. In a velocipede or the like, the combination with the frame, a pedalshaft, and a driving road wheel about said shaft, of a f brake, meansfor anchoringr the same to said frame, and means for actuating saidbrake through the instrumentality of said pedal shaft,

13. In a velocipede or the like, the combination with the frame, thedriving road wheel, and the pedals at said` driving wheel, of a brake,means for anchoring said brake to said frame means whereby said wheelcan be driven upon actuation of said pedals in one direction, but saidwheel Ican rotate free of said pedals, and means whereby a differentactuation of said pedals applies said brake.

14. In a velocipede or the like, the combination with the frame, a pedalshaft. and a driving road wheel about said pedal shaft` of a brake,means for anchoring said brake to said frame, and operative connectionbetween said pedal shaft and said wheel whereby when said pedal shaft isrotated in one direction said wheel is driven, but said wheel can rotateinde endently of said pedal shaft, and when saidp pedal shaftl isrotated in the opposite direction said brake is applied to said wheel.

15. In a velocipede or the like, the combination with the frameincluding the fork t ereof for the drivin road wheel, the pedal shaftsupported in said fork, and the driving wheel having its hub about saidpedal shaft, of a brake anchor about said pedal shaft, means foranchoring said brake, anchor to said fork, a brakeadapted to be anchoredby said brake anchor, and operative connection between said pedal shaftand said hub and between said pedal shaft and said brake wherebyrotation of said pedal shaft in one direction effects driving of saidhub but said hub can rotate independently of said pedal shaft, androtation of said pedal shaft in the opposite direction applies saidbrake to said hub.

16. In a velocipede or the like, the combination with the pedalcrank-shaft having means for connection with the pedals, of the drivingroad wheel with its hub about Said crankshaft, an anchored brakecooperating with said wheel, a shiftable connector, means whereby saidconnector can having its hub drive said wheel when in one of its shiftedpositions and can apply said brake when in another thereof, and meanswhereby said connector is so'shifted upon such movements ofsaidcrank-shaft.

l'h?. In a velocipede or the like, the combination with the frame, thedriving pedal shaft supported thereby, and the drlvin road wheel havingits hub about said eda shaft, of a brake for said hub, a shi ableconnector adapted in one position to drive said hub and in another toapply said brake, and threaded operating connection between sald pedalshaft and said connector.

18. In a velocipede or the like1 the combination with the frame, a pedalshaft supported thereby and having means for con nection with thepedals. a driving road wheel rotatably supported about said pedal shaft,a brake anchor about said pedal shaft and through which the pedal shaftextends, a brake for said hub and held by said brake anchor, and meanswhereby when said pedal shaft is actuated` in one direction said wheelis driven and upon different actuation of said pedal shaft said brake isoperated.

19. In a velocipede or the like, the`combination with the frame, thepedal shaft supported thereby, and the driving road wheel about saidpedal shaft, of spaced bearing cones about said pedal shaft forsupporting said hub, means for anchoring one of said cones to saidframe, a brake anchored by said anchored cone, and means whereby uponactuation of said pedal shaft in one direction said wheel is driven andupon different actuation of said pedal shaft said brake is applied.

20. In a velocipede or the like. the combination with the frame, thepedal shaft supported thereby, and the driving' road wheel about saidpedal shaft, of a brake anchor about said pedal shaft and through whichsaid pedal shaft passes, a brake for said hub cooperatingr with saidanchor, a shiftable connector adapted in one position to drive said huband in another position to apply said brake, and a connector-shiftingelement cooperating with said connector and carried by said pedal shaft.

21. In a brake mechanism, a brake anchor havingr an opening therethroughto produce a sleeve, said sleeve havinar slots in opposite points toeach other and passing entirely through the sleeve, and brake elementsreceived in said slots.

22. In a brake mechanism. a brake anchor having a projecting boss, brakeelements associated with said brake anchor, a brake arm connected tosaid anchor and about said boss, and a locking member for said arm andsecured upon said boss.

23. In a brake mechanism. a shaft, a brake anchor about the same andprovided with an opening which receives said shaft, said lio anchor alsohaving an enlarged opening at one end and communicating with the openingwhich receives said shaft, whereby a shoulder is produced upon saidanchor, said shaft having a reduced portion whereby a shoulder ispresented, and a separable stop element upon said shaft and in saidenlarged opening and between the said shoulders of said anchor and saidshaft. y

24. In a brake mechanism, a brake anchor having an opening therethroughand being provided at one end with an enlarged recess communicating withsaid opening, whereby a shoulder is produced, a shaft extending throughsaid opening and provided with a circumferential groove, and segmentalstop pieces in said groove and said recess and between said shoulders ofsaid anchor and said shaft.

25. In a device of the character indicated, an axle having a threadedenlarged portion, a threaded cone cooperating with the same, and awasher having an opening a portion of which is substantially the size ofthe body plortion of the axle while another portion t ereof is of thesize of the enlarged axle portion.

26. In a device of the character indicated, a hub having a slot therein,a brake element cooperating with said hub and having a portion`extenlding into said slot, a connector cooperating with said brakeelement, and a lag device for said connector and having a portionreceived in said slot.

27. In a device of the character indicated,

a lag spring comprising a member of resilicnt material havin aprojection formed in one portion thereo and clamping arms on oppositesides` of said projection.

28. In a coaster brake mechanism, a power member` a rotatable hub, abrake therefor, a shiftable connector, shifting connection bctween saidpower member and said connector, and a lag device operating upon saidconnector and engaged by said hub to rotate with the latter.

29. In a coaster brake mechanism, a power member. a rotatable hub, abrake therefor, a shiftable connector, shifting connection between saidpower member and said connector, and a lag device yieldingly engagingsaid connector and engaged by said hub to be rotated by the latter.

30. The combination with a vehicle frame, of a coaster brake mechanismcomprising` a rotatable pedal shaft, a driving road wheel having its hubabout said shaft and rotatable with respect thereto, a brake within saidroad wheel hub and acting thereon, means for anchoring said brake tosaid frame, and means within said hub whereby upon rotation of saidshaft in one direction said hub is driven, upon cessation of saidrotation of said shaft said hub can continue to rotate independently ofsaid shaft, and upon opposite rotation of said shaft said brake isapplied.

In testimony whereof I hereunto atiix my signature.

CHARLES B. SIMNIONS.

anchor also having an enlarged opening at one end and communicating withthe opening which receives said shaft, whereby a shoulder is producedupon said anchor, said shaft having a reduced portion whereby a shoulderis presented, and a separable stop element upon said shaft and in saidenlarged opening and between the said shoulders of said anchor and saidshaft.

24. In a brake mechanism, a brake anchor having an opening therethroughand being provided at one end with an enlarged recess communicating withsaid opening, whereby a shoulder is produced, a shaft extending throughsaid opening and rovided with a circumferential groove, an segmentalstop pieces in said groove and said recess and between said shoulders ofsaid anchor and said shaft.

25. In a device of the character indicated, an axle having a threadedenlarged portion, a threaded cone cooperating with the same, and awasher having an opening a portion of which is substantially the size ofthe body ortion of the axle while another portion t ereof is of the sizeof the enlarged axle portion.

26. In a device of the character indicated, a hub having a slot therein,a brake element cooperating with said hub and having a portion-extending into said slot, a connector cooperating with said brakeelement, and a lag device for said connector and having a portionreceived in said slot.

27. In a device of the character indicated,

a lag spring comprising a member of resilient material having aprojection formed in one portion thereo and clamping arms on oppositesides of said projection.

28. In a coaster brake mechanism, a power member, a rotatable hub, abrake therefor, a shift-able connector, shifting connection between saidpower member and said connector, and a lag device operating upon saidcon` nector and engaged by said hub to rotate with the latter.

29. In a coaster brake mechanism, a power member` a rotatable hub, abrake therefor, a shiftable connector, shifting connection be tween saidpower member and said connector, and a lag device yieldingly engagingsaid connector and engaged by said hub to be rotated by the latter.

30. The combination with a vehicle frame, of a coaster brake mechanismcomprising a rotatable pedal shaft, a driving road wheel having its hubabout said shaft and rotatable with respect thereto, a brake within saidroad wheel hub and acting thereon` means for anchoring said brake tosaid frame, and means within said hub whereby upon rotation of saidshaft in one direction said hub is driven, upon cessation of saidrotation of said shaft said hub can continue to rotate independently ofsaid shaft, and upon opposite rotation of said shaft said brake isapplied.

In testimony whereof I hereunto aix my signature.

CHARLES B. SIMMONS.

Certicate of Correction.

kIt is hereby certified that in Letters Patent No. 1'-,526,`8", February17 ,17, `1925, upon the application of Charles B. Simmons, of Bristol,Connecticut, foren@ improvement in Coaster-Brake Mechanism, an 'error 4apears 1n the printed ifcation 0f filin said Letters requiring correctionas follows: In the hea ingjofthe drawing, application, for Dec. 27, 1922read-Dec. 2?', 1921,v` and that the I atent should be read with thiscorrection therein that the same may conform to the record of the casein the Patent Giice. Signed and sealed this 24th day of March, A. D.1925.

[SEAL] KARL FENNING,

p ,Acting Gommz'ssioner of Patents.

v Certiiioate of Correction.

`It is heebycertified that in Letters Patent No. `1'?,526,`385"4giantedFebruary 17h, 1925, upon the application of Charles B. Simmons, ofBristol, Connecticut, foi* an' improvement iny Coaster-Brake Mechanism,an 'error 4appears in the printed io'ation requiring correction asfollows: In the hezaidng ofthe drawin of lin application, for pDea 27,1922 read Dec. 27, 1.921," and tht the said Letters atent should be readwith this correction therein that the same may leonform to the record ofthe case in the Patent Oce. t t

Signedand thisy 24th day of March, A. D. 1925.

[mn] y FENNING,

v 00m/miami' of Patents.

